As his class project Reggie asks 30 undergraduates to select their preference for class format (face-to-face or online). He analyses the data and finds t(28) = 5.73, p < .05, d = .40. How should he interpret his results?
A. His results were significant with a weak effect size and he needs to report whether more students preferred face-to-face or online classes.
B. His results were significant with 40% of the variability in preference for class type accounted for.
C. He should analyze the data again by computing a different statistical test because the data are nominal.
D. He should analyze the data again by computing the 95% confidence interval.
Ans: C
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